[Bug]: Window overlaps on multiple monitors

Checks before filing an issue

• This issue doesn't reproduce on web browsers (such as in Chrome). If it does, issue reports go to the Mattermost Server repository.
• I have checked the issue tracker and have not found an issue that matches the one I'm filing. This should include closed issues.
• This issue is not a troubleshooting question. Troubleshooting questions go here: https://forum.mattermost.com/c/trouble-shoot/16.
• This issue is not a feature request. You can request features and make product suggestions here: https://mattermost.com/suggestions/.
• This issue reproduces on the most recent stable version, or the most recent prerelease version of the Mattermost Desktop App.
• I have read the contribution guidelines.

Mattermost Desktop Version

6.0.1

Operating System

Ubuntu 24.04.3 LTS

Mattermost Server Version

11.0.5

Steps to reproduce

Start Mattermost on a setup with 2 monitors next to each other.
Maximize the mattermost app on the left screen.

Expected behavior

The desktop app should only be visible on the left screen.

Observed behavior

You can see a 1px wide "border" overlapping onto the right screen.

It is only observable on the left screen. On the right screen everything seems fine.

Log Output

No logs are written while resizing or moving the window.

Additional Information

No response

Reproduce the issue on Ubuntu 24.04.3 with two adjacent monitors, using Mattermost Desktop 6.0.1 and the maximize action. Trace the desktop window handling involved in maximizing across multiple displays; done means no visible border overlaps the neighboring screen while the app remains maximized on the left display.